下面這些都可以作單數名詞

abyss

access

address

ass

athletics

bans

basis

bass

bias

binoculars

bliss

boss

brass

bris

bus

cactus

carcass

caress

cess

chablis

chess

class

clothes

compress

congress

cress

cross

cypress

dais

Dallas

diabetes

dialysis

dress

dross

duress

egress

emphasis

excess

express

floss

fortress

fuss

gas

glass

gloss

goddess

grass

gross

guess

hippopotamus

hiss

homunculus

ibis

impress

iris

jeans

kiss

lass

lens

less

loss

loess

mantis

mass

Massachusetts

mathematics

measles

mess

minus

miss

mistress

molasses

morass

moss

mumps

muss

narcissus

news

octopus

pants

papyrus

Paris

pass

physics

platypus

plus

press (printing)

progress

pus

puss

rebus

redress

regress

sass

sassafras

sis

stress

stylus

success

Texas

tights

tongs

tress

trousers

truss

tweezers

walrus

watercress

witness

yes

Zeus